Movable object and method of manufacturing the same

ABSTRACT

A movable object includes: a steering part including a wheel provided to rotate along a ground, a wheel rod connected to the wheel and extending in a direction away from the wheel, and a steering motor connected to the wheel rod to rotate the wheel rod and steer the wheel; and a cover part disposed on top of the steering part, and including a receiving member in which a portion of the steering part is received. When the steering motor rotates the wheel rod in one direction, the steering part is engaged with the receiving member so that the steering part and the cover part may be joined, and when the steering motor rotates the wheel rod in an opposite direction, the steering part is separated from the receiving member so that the steering part and the cover part may be disengaged.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims under 35 U.S.C. § 119(a) the benefit of KoreanPatent Application No. 10-2021-0036199, filed on Mar. 19, 2021 in theKorean Intellectual Property Office, the entire contents of which areincorporated by reference herein.

BACKGROUND (a) Technical Field

The present disclosure relates to a movable object and a method ofmanufacturing the same.

(b) Description of the Related Art

In general, a platforming strategy for designing a vehicle platform thatshares some common parts is widely used in the mobility manufacturingindustry including automobiles for reasons of cost reduction and ease ofdesign change due to economies of scale.

In particular, there are methods of manufacturing various types ofelectric vehicles according to the vehicles' purposes by building onelower platform and fixing various types of upper frames to thecorresponding lower platform. For example, different types of mobilitymay be manufactured as needed by installing upper frames appropriate forthe purposes of various modified vehicles such as food trucks,ambulances, unmanned delivery, or the like on a lower platform where adriving unit is mounted, or by replacing the existing upper frame withthe upper frames for the other purposes. This is called “purpose-basedmobility” or “purpose built vehicle (PBV)”, which represents thefoundation of future industries proposed by various mobilitymanufacturers.

However, since the mobility includes complex structures and many typesof parts/components, it may require a significant amount time andmanpower to install the upper frame on the lower platform or replace theupper frame installed on the lower platform with another upper frame.

SUMMARY

An aspect of the present disclosure provides a movable object and amethod of manufacturing a movable object, capable of reducing the timeand manpower required for assembly or disassembly of an upper frame anda lower platform during a process of manufacturing the movable object.

According to an aspect of the present disclosure, a movable object mayinclude: a steering part including a wheel provided to rotate along aground, a wheel rod connected to the wheel and extending in a directionaway from the wheel, and a steering motor connected to the wheel rod torotate the wheel rod and steer the wheel; and a cover part disposed ontop of the steering part, and including a receiving member in which aportion of the steering part is received. When the steering motorrotates the wheel rod in one direction, the steering part may be engagedwith the receiving member so that the steering part and the cover partmay be joined, and when the steering motor rotates the wheel rod in anopposite direction, the steering part may be separated from thereceiving member so that the steering part and the cover part may bedisengaged.

The steering part may further include an insertion rod connectable to anupper region of the wheel rod and extending from the wheel rod towardthe receiving member, the receiving member may have a receiving holeprovided in a lower portion of the cover part and allowing the insertionrod to be inserted thereinto, when the steering motor rotates the wheelrod in the one direction, the insertion rod may be inserted into thereceiving hole so that the steering part and the cover part may bejoined, and when the steering motor rotates the wheel rod in theopposite direction, the insertion rod may be separated from thereceiving hole so that the steering part and the cover part may bedisengaged.

An upper region of the insertion rod may have a screw bolt structure,and the receiving hole may have a shape corresponding to that of thebolt structure of the insertion rod.

The insertion rod may have a recess which is concave upward from aportion of a lower region of the insertion rod facing the wheel rod, andan outer circumferential surface of the upper region of the wheel rodmay have a shape corresponding to that of an inner circumferentialsurface of the recess.

The steering part may further include a linear motor moving the wheelrod upwardly or downwardly.

The steering part may further include a decoupling member which mediatesor blocks power transfer from the steering motor to a lower region ofthe wheel rod connected to the wheel.

A first thread structure may be provided in the outer circumferentialsurface of the upper region of the wheel rod, and a second threadstructure corresponding to the first thread structure may be provided inthe inner circumferential surface of the recess.

When the wheel rod is inserted into the recess and the linear motormoves the wheel rod upwardly, the wheel rod may press the insertion rodupwardly due to interference between the wheel rod and the insertion rodand move the insertion rod upwardly.

The movable object may further include a base part disposed between thesteering part and the cover part and having a through hole allowing thewheel rod to pass therethrough. The wheel rod may pass through thethrough hole and be received in the receiving member.

The linear motor may be disposed above the steering motor.

According to another aspect of the present disclosure, a method ofmanufacturing a movable object may include: a preparation step ofpreparing a wheel, a steering part including a wheel rod connected tothe wheel and a steering motor rotating the wheel rod to steer thewheel, and a cover part including a receiving member in which a portionof the steering part is received; an engagement step of joining thesteering part and the cover part by engaging the steering part with thereceiving member; and a disengagement step of disengaging the steeringpart from the cover part by separating the steering part from thereceiving member. In the engagement step, the steering part and thecover part may be joined by driving the steering motor to rotate thewheel rod in one direction.

In the disengagement step, the steering part and the cover part may bedisengaged by driving the steering motor to rotate the wheel rod in anopposite direction.

The steering part may further include an insertion rod connectable to anupper region of the wheel rod, and the engagement step may furtherinclude inserting the insertion rod into the receiving member by drivingthe steering motor to rotate the wheel rod in the one direction.

The disengagement step may further include separating the insertion rodfrom the receiving member by driving the steering motor to rotate thewheel rod in the opposite direction.

The engagement step may further include connecting the wheel rod to theinsertion rod to allow the wheel rod and the insertion rod to rotatetogether.

The disengagement step may further include separating the wheel rod fromthe insertion rod.

In the engagement step, the steering part and the cover part may bejoined after the wheel rod is decoupled from the steering motor so thatpower transfer from the steering motor to the wheel rod may be blocked.

In the engagement step, after the steering part and the cover part arejoined, the wheel rod and the steering motor may be coupled so thatpower transfer may be made from the steering motor to the wheel rod.

The method may further include an alignment step of aligning each wheelwhich is provided on the steering part, and the alignment step may beperformed between the preparation step and the engagement step.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings:

FIG. 1 illustrates a perspective view of a movable object according toan exemplary embodiment of the present disclosure;

FIG. 2 illustrates an exploded perspective view of a movable objectaccording to an exemplary embodiment of the present disclosure;

FIG. 3 illustrates a perspective view of the joining of a steering part,a base part, and a cover part according to an exemplary embodiment ofthe present disclosure; and

FIG. 4 illustrates a cross-sectional view of a steering part accordingto an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION

It is understood that the term “vehicle” or “vehicular” or other similarterm as used herein is inclusive of motor vehicles in general such aspassenger automobiles including sports utility vehicles (SUV), buses,trucks, various commercial vehicles, watercraft including a variety ofboats and ships, aircraft, and the like, and includes hybrid vehicles,electric vehicles, plug-in hybrid electric vehicles, hydrogen-poweredvehicles and other alternative fuel vehicles (e.g. fuels derived fromresources other than petroleum). As referred to herein, a hybrid vehicleis a vehicle that has two or more sources of power, for example bothgasoline-powered and electric-powered vehicles.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the disclosure.As used herein, the singular forms “a,” “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises”and/or “comprising” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof. As used herein, the term “and/or”includes any and all combinations of one or more of the associatedlisted items. Throughout the specification, unless explicitly describedto the contrary, the word “comprise” and variations such as “comprises”or “comprising” will be understood to imply the inclusion of statedelements but not the exclusion of any other elements. In addition, theterms “unit”, “-er”, “-or”, and “module” described in the specificationmean units for processing at least one function and operation, and canbe implemented by hardware components or software components andcombinations thereof.

Further, the control logic of the present disclosure may be embodied asnon-transitory computer readable media on a computer readable mediumcontaining executable program instructions executed by a processor,controller or the like. Examples of computer readable media include, butare not limited to, ROM, RAM, compact disc (CD)-ROMs, magnetic tapes,floppy disks, flash drives, smart cards and optical data storagedevices. The computer readable medium can also be distributed in networkcoupled computer systems so that the computer readable media is storedand executed in a distributed fashion, e.g., by a telematics server or aController Area Network (CAN).

Hereinafter, exemplary embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings. In thedrawings, the same reference numerals will be used throughout todesignate the same or equivalent elements. In addition, a detaileddescription of well-known techniques associated with the presentdisclosure will be ruled out in order not to unnecessarily obscure thegist of the present disclosure.

FIG. 1 illustrates a perspective view of a movable object according toan exemplary embodiment of the present disclosure; FIG. 2 illustrates anexploded perspective view of a movable object according to an exemplaryembodiment of the present disclosure; FIG. 3 illustrates a perspectiveview of the joining of a steering part, a base part, and a cover partaccording to an exemplary embodiment of the present disclosure; and FIG.4 illustrates a cross-sectional view of a steering part according to anexemplary embodiment of the present disclosure.

As illustrated in FIGS. 1 to 4, a movable object according to exemplaryembodiments of the present disclosure may include a steering part 100and a cover part 200. The movable object may be formed by quicklyassembling the steering part 100 and one of various types of cover parts200 fit for a specific purpose. The cover part 200 may be configured tocover an upper region of the movable object.

As illustrated in FIG. 4, the steering part 100 may include a wheel 110,a wheel rod 120, and a steering motor 130. The wheel 110 may rotate onan axis extending parallel to the ground by a separate electric motor(not shown) so that the wheel 110 may rotate along the ground. By therotation of the wheels 110, the movable object may move along theground.

The wheel rod 120 may be connected to the wheel 110 and extend in adirection away from the wheel 110. For example, the wheel rod 120 mayextend upwardly from the wheel 110 (see FIG. 4).

The steering motor 130 may be an electric motor that converts electricenergy into rotational kinetic energy. The steering motor 130 may beconnected to the wheel rod 120 to rotate the wheel rod 120. As thesteering motor 130 rotates the wheel rod 120, the wheel 110 connected tothe wheel rod 120 may rotate on the wheel rod 120 serving as a shaft. Asthe wheel 110 is rotated by the rotation of the steering motor 130, thewheel 110 may be steered, and the movable object may be steeredaccordingly. In addition, the steering motor 130 may be used for joiningand separating (engagement and disengagement) of the steering part 100and the cover part 200 to be described below.

As illustrated in FIGS. 1 and 2, the cover part 200 may be disposed ontop of the steering part 100. In addition, as illustrated in FIGS. 3 and4, a receiving member 210 in which a portion of the steering part 100 isreceived may be provided in a lower portion of the cover part 200. Asthe steering part 100 is partially received in the receiving member 210,the cover part 200 and the steering part 100 may be joined to eachother.

Joining between the steering part 100 and the cover part 200 may beperformed by the steering motor 130. That is, according to exemplaryembodiments of the present disclosure, as the steering motor 130 rotatesthe wheel rod 120 in one direction, a portion of the steering part 100may be engaged with the receiving member 210 so that the steering part100 and the cover part 200 may be joined to each other.

According to exemplary embodiments of the present disclosure, thedisengagement of the steering part 100 and the cover part 200 may alsobe performed by the steering motor 130. That is, as the steering motor130 rotates the wheel rod 120 in the opposite direction (i.e., oppositeto the one direction), the portion of the steering part 100 may beseparated from the receiving member 210 so that the steering part 100and the cover part 200 may be disengaged.

According to exemplary embodiments of the present disclosure, byassembling the steering part 100 and the cover part 200 using thesteering motor 130, the assembly method and assembly structure of themovable object may be simplified, and the time and manpower required forassembly may be reduced. In addition, by joining the steering part 100and the cover part 200 having various sizes and structures according topurposes of the movable object, various types of movable objects may beused for various applications.

As illustrated in FIG. 4, the steering part 100 according to anexemplary embodiment of the present disclosure may further include aninsertion rod 140. The insertion rod 140 may be connectable to an upperregion 120 a of the wheel rod 120 and extend from the wheel rod 120toward the receiving member 210. Here, the upper region 120 a of thewheel rod 120 may include a separate member which is coupled to an upperportion of the wheel rod 120 through another element/component. That is,the insertion rod 140 may be directly connected to the wheel rod 120 ormay be indirectly connected to the wheel rod 120 through another member.When the wheel rod 120 and the insertion rod 140 are connected, theinsertion rod 140 may rotate together with the wheel rod 120.

The receiving member 210 may have a receiving hole 211. The receivinghole 211 may be provided in the lower portion of the cover part 200. Thereceiving hole 211 may be recessed upwardly from the lower portion ofthe cover part 200 so that the insertion rod 140 may be inserted intothe receiving hole 211. The shape of the receiving hole 211 maycorrespond to that of the insertion rod 140.

When the wheel rod 120 rotates in the one direction by the driving ofthe steering motor 130, the insertion rod 140 directly or indirectlyconnected to the wheel rod 120 may also rotate with the wheel rod 120 inthe one direction. While rotating, the insertion rod 140 may be insertedinto the receiving hole 211 so that the steering part 100 and the coverpart 200 may be joined to each other.

In addition, the insertion rod 140 may rotate together with the wheelrod 120 in the opposite direction (i.e., opposite to the one direction)by the driving of the steering motor 130. While rotating, the insertionrod 140 may be separated from the receiving hole 211 so that thesteering part 100 and the cover part 200 may be disengaged.

According to an exemplary embodiment of the present disclosure, sincethe insertion rod 140 is provided, a user may selectively allow thesteering motor 130 to intervene in engagement or disengagement of thesteering part 100 and the cover part 200. That is, when the insertionrod 140 is connected to the wheel rod 120, the user may cause thesteering part 100 and the cover part 200 to be engaged or disengagedthrough the rotation of the steering motor 130. On the other hand, whenthe insertion rod 140 and the wheel rod 120 are separated from eachother, the user may allow the wheel 110 to be steered through therotation of the steering motor 130 without intervention in theengagement of the steering part 100 and the cover part 200.

An upper region of the insertion rod 140 may have a screw boltstructure, and an internal surface of the receiving hole 211 may have anut shape corresponding to the bolt structure of the insertion rod 140.Thus, a bolt-nut connection may be made between the insertion rod 140and the receiving hole 211, and as a result, the steering part 100 andthe cover part 200 may be more effectively joined to each other.

A recess 141 may be formed in the insertion rod 140. The recess 141 maybe disposed in a portion of a lower region of the insertion rod 140facing the wheel rod 120, and may be recessed upwardly and concavely. Asthe upper region 120 a of the wheel rod 120 is inserted into the recess141, the insertion rod 140 and the wheel rod 120 may be connected toeach other.

An outer circumferential surface of the upper region 120 a of the wheelrod 120 may have a shape corresponding to that of an innercircumferential surface of the recess 141. As the outer circumferentialsurface of the upper region 120 a of the wheel rod 120 and the innercircumferential surface of the recess 141 have the corresponding shape,the insertion rod 140 and the wheel rod 120 may be connected moreeffectively.

Meanwhile, a first thread structure (external thread) 121 may be formedon the outer circumferential surface of the upper region 120 a of thewheel rod 120, and a second thread structure (internal thread) 142corresponding to the first thread structure 121 may be formed on theinner circumferential surface of the recess 141. That is, the wheel rod120 and the insertion rod 140 may be engaged with each other through thethread structures with an increased clamping force therebetween.

The steering part 100 according to an exemplary embodiment of thepresent disclosure may further include a linear motor 150. For example,the linear motor 150 may be disposed above the steering motor 130.However, the position of the linear motor 150 is not limited thereto.The linear motor 150 may move the wheel rod 120 upwardly so that thewheel rod 120 may be connected to the insertion rod 140, or move thewheel rod 120 downwardly so that the wheel rod 120 may be separated fromthe insertion rod 140.

In addition, the linear motor 150 may move the wheel rod 120 upwardly tocause the wheel rod 120 to be inserted into the recess 141, and thenmove the wheel rod 120 further upwardly to cause the wheel rod 120 tomove the insertion rod 140 upwardly. That is, the linear motor 150 maycause the wheel rod 120 and the insertion rod 140 to be connected toeach other, and cause the insertion rod 140 to be inserted into thereceiving hole 211.

In other words, the linear motor 150 may be configured to drive thewheel rod 120 to cause the insertion rod 140 and the wheel rod 120 to beengaged or disengaged, and cause the insertion rod 140 to be engagedwith or disengaged from the receiving member 210.

More specifically, according to an exemplary embodiment of the presentdisclosure, when the linear motor 150 continues to drive and move thewheel rod 120 upwardly even after the wheel rod 120 is inserted into therecess 141 by the driving of the linear motor 150, the wheel rod 120 maypress the insertion rod 140 upwardly due to interference between thewheel rod 120 and the insertion rod 140 and move the insertion rod 140upwardly. Thus, the insertion rod 140 may be engaged with the receivingmember 210.

The steering part 100 according to an exemplary embodiment of thepresent disclosure may further include a decoupling member. Thedecoupling member may be disposed between the steering motor 130 and thewheel rod 120 to mediate or block the transfer of power from thesteering motor 130 to a lower region 120 b of the wheel rod 120.

For example, in a process of joining the steering part 100 and the coverpart 200 using the steering motor 130, the decoupling member may blockthe steering motor 130 from transferring power to the lower region 120 bof the wheel rod 120. On the other hand, in order to steer the movableobject using the steering motor 130 in a normal driving process of themovable object, the decoupling member may mediate between the steeringmotor 130 and the wheel rod 120 to allow the steering motor 130 totransfer power to the lower region 120 b of the wheel rod 120.

As the decoupling member is provided, the user may selectively allow thesteering motor 130 to steer the wheel 110 as needed. As a result, a tiremounted on the wheel 110 may be prevented from being worn due to therotation of the wheel rod during the assembly process of the steeringpart 100 and the cover part 200.

As illustrated in FIG. 2, the movable object according to an exemplaryembodiment of the present disclosure may further include a base part300. The base part 300 may form a frame of a lower region of the movableobject. The base part 300 may have a through hole 310 into which aportion of the steering part 100 is inserted. More specifically, thebase part 300 may be disposed between the steering part 100 and thecover part 200, and the through hole 310 may allow the wheel rod 120(see FIG. 4) to pass therethrough. In addition, as illustrated in FIG.3, the through hole 310 (see FIG. 2) of the base part 300 and thereceiving hole 211 of the cover part 200 may face each other in avertical direction. The individual elements constituting the steeringpart 100 may be connected to the base part 300 and the cover part 200 sothat they may be firmly assembled to form the movable object.

Hereinafter, a method of manufacturing a movable object according toexemplary embodiments of the present disclosure will be described. Thesame reference numerals will be used to designate the same or equivalentelements as those of the movable object according to the above-describedexemplary embodiments of the present disclosure, and a detaileddescription of those elements will be omitted.

The method of manufacturing a movable object according to exemplaryembodiments of the present disclosure relates to a method ofmanufacturing the movable object by assembling the steering part 100including the steering motor 130 and the cover part 200 using thesteering motor 130 by which the movable object is steered. The coverpart 200 may include various types of platforms that may be easilychanged according to purpose. The user may easily join the cover part200 and the steering part 100 or disengage them from their engagementusing the steering motor 130.

The method of manufacturing a movable object according to exemplaryembodiments of the present disclosure may include the following steps: apreparation step, an engagement step, and a disengagement step.

In the preparation step, the following elements may be prepared: thewheel 110; the steering part 100 including the wheel rod 120 connectedto the wheel 110 and the steering motor 130 rotating the wheel rod 120to steer the wheel 110; and the cover part 200 including the receivingmember 210 in which a portion of the steering part 100 is received. Thepreparation step may further include preparing the base part 300 betweenthe steering part 100 and the cover part 200.

The engagement step may be a step of joining the steering part 100 andthe cover part 200 by engaging a portion of the steering part 100 withthe receiving member 210. More specifically, in the engagement step, thesteering part 100 and the cover part 200 may be joined by driving of thesteering motor 130 to rotate the wheel rod 120 in the one direction.

The disengagement step may be a step of disengaging the steering part100 from the cover part 200 by separating a portion of the steering part100 from the receiving member 210.

According to an exemplary embodiment of the present disclosure, thesteering part 100 may further include the insertion rod 140 connectableto the upper region 120 a of the wheel rod 120.

In this case, in the engagement step, the insertion rod 140 and thewheel rod 120 may be connected to each other so that the wheel rod 120and the insertion rod 140 may rotate together. The connection of thewheel rod 120 and the insertion rod 140 may be made by inserting theupper region 120 a of the wheel rod 120 into the recess 141 provided inthe lower region of the insertion rod 140 using the linear motor 150.

In addition, according to an exemplary embodiment of the presentdisclosure, the engagement step may include inserting the insertion rod140 into the receiving hole 211 of the receiving member 210 bycontinuously driving the steering motor 130 to rotate the wheel rod 120in the one direction even after the wheel rod 120 and the insertion rod140 are connected to each other.

That is, according to an exemplary embodiment of the present disclosure,the insertion rod 140 may be inserted into the receiving hole 211 in theengagement step, so that joining between the steering part 100 and thecover part 200 may be achieved.

In addition, in the engagement step according to an exemplary embodimentof the present disclosure, the steering part 100 and the cover part 200may be joined after the lower region 120 b of the wheel rod 120 isdecoupled from the steering motor 130 so that the transfer of power fromthe steering motor 130 to the lower region 120 b of the wheel rod 120may be blocked. Thus, as the lower region 120 b of the wheel rod 120 andthe steering motor 130 are decoupled from each other in the engagementstep, the steering motor 130 may rotate the insertion rod 140 connectedto the upper region 120 a of the wheel rod 120 to join the steering part100 and the cover part 200, without rotating the wheel 110 connected tothe lower region 120 b of the wheel rod 120 in a steering direction.Thus, in the engagement step, the wheel 110 may be prevented from beingworn by the driving of the steering motor 130.

Meanwhile, in the engagement step, after the steering part 100 and thecover part 200 are joined, the lower region 120 b of the wheel rod 120and the steering motor 130 may be coupled so that power may betransferred from the steering motor 130 to the lower region 120 b of thewheel rod 120. Thus, after the joining of the steering part 100 and thecover part 200 is completed, the wheel 110 may be steerable again by thesteering motor 130.

The method of manufacturing a movable object according to an exemplaryembodiment of the present disclosure may further include an alignmentstep, in which each wheel 110 provided on the steering part 100 may bealigned. The alignment step may be performed between the preparationstep and the engagement step. By performing the engagement step in astate in which the wheels 110 are aligned, the wheels 110 may bemaintained in an aligned state even after the joining of the steeringpart 100 and the cover part 200 is completed.

In the disengagement step according to an exemplary embodiment of thepresent disclosure, the steering part 100 and the cover part 200 may bedisengaged by driving the steering motor 130 to rotate the wheel rod 120in the opposite direction (i.e., opposite to the one direction).

In addition, in the disengagement step, the wheel rod 120 may beconnected to the insertion rod 140 provided to be interlocked with thewheel rod 120 before the steering motor 130 rotates the wheel rod 120 inthe opposite direction to disengage the steering part 100 from the coverpart 200. Similar to the engagement step, the connection of the wheelrod 120 and the insertion rod 140 may be made by inserting the upperregion 120 a of the wheel rod 120 into the recess 141 provided in thelower region of the insertion rod 140 using the linear motor 150

In the disengagement step, after the wheel rod 120 and the insertion rod140 are connected, the steering motor 130 may rotate the wheel rod 120in the opposite direction and rotate the insertion rod 140 interlockedwith the wheel rod 120 so that the insertion rod 140 may be separatedfrom the receiving member 210. As a result, the steering part 100 andthe cover part 200 may be disengaged.

In addition, the disengagement step may further include separating thewheel rod 120 and the insertion rod 140 from each other after thedisengagement of the steering part 100 and the cover part 200.

The method of manufacturing a movable object according to exemplaryembodiments of the present disclosure may be simplified by engaging ordisengaging the steering part 100 and the cover part 200 using thesteering motor 130, thereby reducing the assembly time and costrequired.

As set forth above, according to exemplary embodiments of the presentdisclosure, the assembly method and assembly structure of the movableobject may be simplified by assembling the steering part and the coverpart using the steering motor, and the time and manpower required forassembly may be reduced.

Hereinabove, although the present disclosure has been described withreference to exemplary embodiments and the accompanying drawings, thepresent disclosure is not limited thereto, but may be variously modifiedand altered by those skilled in the art to which the present disclosurepertains without departing from the spirit and scope of the presentdisclosure claimed in the following claims.

What is claimed is:
 1. A movable object, comprising: a steering partincluding a wheel provided to rotate along a ground, a wheel rodconnected to the wheel and extending in a direction away from the wheel,and a steering motor connected to the wheel rod to rotate the wheel rodand steer the wheel; and a cover part disposed on top of the steeringpart, and including a receiving member in which a portion of thesteering part is received, wherein when the steering motor rotates thewheel rod in one direction, the steering part is engaged with thereceiving member so that the steering part and the cover part arejoined, and when the steering motor rotates the wheel rod in an oppositedirection, the steering part is separated from the receiving member sothat the steering part and the cover part are disengaged.
 2. The movableobject according to claim 1, wherein: the steering part further includesan insertion rod connectable to an upper region of the wheel rod andextending from the wheel rod toward the receiving member, the receivingmember has a receiving hole provided in a lower portion of the coverpart and allowing the insertion rod to be inserted thereinto, when thesteering motor rotates the wheel rod in the one direction, the insertionrod is inserted into the receiving hole so that the steering part andthe cover part are joined, and when the steering motor rotates the wheelrod in the opposite direction, the insertion rod is separated from thereceiving hole so that the steering part and the cover part aredisengaged.
 3. The movable object according to claim 2, wherein: anupper region of the insertion rod has a screw bolt structure, and thereceiving hole has a shape corresponding to that of the bolt structureof the insertion rod.
 4. The movable object according to claim 3,wherein: the insertion rod has a recess which is concave upward from aportion of a lower region of the insertion rod facing the wheel rod, andan outer circumferential surface of the upper region of the wheel rodhas a shape corresponding to that of an inner circumferential surface ofthe recess.
 5. The movable object according to claim 4, wherein thesteering part further includes a linear motor moving the wheel rodupwardly or downwardly.
 6. The movable object according to claim 3,wherein the steering part further includes a decoupling member whichmediates or blocks power transfer from the steering motor to a lowerregion of the wheel rod connected to the wheel.
 7. The movable objectaccording to claim 4, wherein: a first thread structure is provided inthe outer circumferential surface of the upper region of the wheel rod,and a second thread structure corresponding to the first threadstructure is provided in the inner circumferential surface of therecess.
 8. The movable object according to claim 5, wherein when thewheel rod is inserted into the recess and the linear motor moves thewheel rod upwardly, the wheel rod presses the insertion rod upwardly dueto interference between the wheel rod and the insertion rod and movesthe insertion rod upwardly.
 9. The movable object according to claim 1,further comprising a base part disposed between the steering part andthe cover part and having a through hole allowing the wheel rod to passtherethrough, wherein the wheel rod passes through the through hole andis received in the receiving member.
 10. The movable object according toclaim 5, wherein the linear motor is disposed above the steering motor.11. A method of manufacturing a movable object, the method comprising: apreparation step of preparing a wheel, a steering part including a wheelrod connected to the wheel and a steering motor rotating the wheel rodto steer the wheel, and a cover part including a receiving member inwhich a portion of the steering part is received; an engagement step ofjoining the steering part and the cover part by engaging the steeringpart with the receiving member; and a disengagement step of disengagingthe steering part from the cover part by separating the steering partfrom the receiving member, wherein in the engagement step, the steeringpart and the cover part are joined by driving the steering motor torotate the wheel rod in one direction.
 12. The method according to claim11, wherein in the disengagement step, the steering part and the coverpart are disengaged by driving the steering motor to rotate the wheelrod in an opposite direction.
 13. The method according to claim 11,wherein: the steering part further includes an insertion rod connectableto an upper region of the wheel rod, and the engagement step furtherincludes inserting the insertion rod into the receiving member bydriving the steering motor to rotate the wheel rod in the one direction.14. The method according to claim 13, wherein the disengagement stepfurther includes separating the insertion rod from the receiving memberby driving the steering motor to rotate the wheel rod in the oppositedirection.
 15. The method according to claim 13, wherein the engagementstep further includes connecting the wheel rod to the insertion rod toallow the wheel rod and the insertion rod to rotate together.
 16. Themethod according to claim 14, wherein the disengagement step furtherincludes separating the wheel rod from the insertion rod.
 17. The methodaccording to claim 11, wherein in the engagement step, the steering partand the cover part are joined after the wheel rod is decoupled from thesteering motor so that power transfer from the steering motor to thewheel rod is blocked.
 18. The method according to claim 17, wherein inthe engagement step, after the steering part and the cover part arejoined, the wheel rod and the steering motor are coupled so that powertransfer is made from the steering motor to the wheel rod.
 19. Themethod according to claim 11, further comprising an alignment step ofaligning each wheel which is provided on the steering part, wherein thealignment step is performed between the preparation step and theengagement step.